Now my rig is not quite as beautiful as before but way more functional. When I am in the dump shooting, when I have the rig loaded with gear I cannot afford twisting handles or peeling slipping cork. With the drilled holes and screws in place everything is pretty much rock solid. Will have to take some extra screws and such (toolkit?) as backups but it looks like that problem is solved. Gosh I am a rather lousy repair-builder dude but got that job done satisfactorily!
Am proud of myself :))!